function chooseTimeFormat(callback) {
    //格式化日期时间
    Date.prototype.pattern = function (fmt) {
        var o = {
            "M+": this.getMonth() + 1, //月份         
            "d+": this.getDate(), //日         
            "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12, //小时         
            "H+": this.getHours(), //小时         
            "m+": this.getMinutes(), //分         
            "s+": this.getSeconds(), //秒         
            "q+": Math.floor((this.getMonth() + 3) / 3), //季度         
            "S": this.getMilliseconds() //毫秒         
        };
        var week = {
            "0": "/u65e5",
            "1": "/u4e00",
            "2": "/u4e8c",
            "3": "/u4e09",
            "4": "/u56db",
            "5": "/u4e94",
            "6": "/u516d"
        };
        if (/(y+)/.test(fmt)) {
            fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
        }
        if (/(E+)/.test(fmt)) {
            fmt = fmt.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "/u661f/u671f" : "/u5468") : "") + week[this.getDay() + ""]);
        }
        for (var k in o) {
            if (new RegExp("(" + k + ")").test(fmt)) {
                fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
            }
        }
        return fmt;
    }

    var date = new Date();
    //console.log("格式化前：" + date);
    var fmtDate = date.pattern("yyyy-MM-dd hh:mm:ss");
    //console.log("格式化后：" + fmtDate);
    callback(fmtDate, date);

}
module.exports.chooseTimeFormat = chooseTimeFormat;